Sergey Andreyevich Kruglov (also Sergei Kruglov, Russian: ?????´? ????????? ???????; born March 27, 1985 in Khabarovsk) is a Russian sport shooter.
In 2010, Kruglov had won a gold medal for the 10 m air rifle at the European Shooting Championships in Meråker, Norway, and eventually captured the bronze at the ISSF World Cup in Fort Benning, Georgia, United States.
He is also a member of CSA Pomoriye and is coached and trained by Oleg Seleznev.Kruglov represented Russia at the 2008 Summer Olympics in Beijing, where he competed in the men's 10 m air rifle, along with his teammate Konstantin Prikhodtchenko.
He finished only in eighth place by seven tenths of a point (0.7) behind Serbia's Stevan Pletikosic, for a total score of 697 targets (595 in the preliminary rounds and 102 in the final).